Heat accumulators, hot air apparatus, namely, hot air space heating apparatus, hot air bath fittings, namely, hot air hand dryers, heating apparatus, namely, steam radiators for heating buildings, electric heating apparatus, namely, electric radiators for heating buildings, heat regenerators, namely, heating elements for hot water heaters, immersion heaters for hot water heaters, heating plates, namely, electric hot plates, heat pumps, electric heating filaments, thermostatic valves, heating ...